I think judging colors from these posted pics is going to be problematic. Lighting conditions camera color bias and computer screen settings will all effect the hue for the colors.
On my screen Brewbrothers gauges look dark green (and kind of bluish). Except for the blue, the shade of green looks correct for 75.
Stinkgrays, look like my 76 CB550F (light green). Also, correct for that year.
My 75 gauges are all sun faded so they are lighter than what they once were, but still darker than the 76 gauges.
As for what is correct for your bike, what is the frame number? Some bikes are tittled incorrectly with respect to Honda's model year convention. I don't think the light gauge faces were a rolling change. But, rather a model year differentiator.
Cheers,